Devices On The Smbus - HP XM600 - Kayak - 128 MB RAM Technical Reference Manual

Audio Chip
Specifications
Feature
Digitized Sounds
Music Synthesizer
Mixer
Line Input
Line Output
Microphone Input
Stereo Out Jack

Devices on the SMBus

The SMBus is a subset of the I
at a maximum speed of 100 kHz. It is used to monitor some of the hardware
functions of the system board (such as voltage levels, temperature, fan
speed, memory presence and type), both at system boot and during normal
run-time. It is controlled by the SMBus controller located in the ICH. The
following devices are connected to the SMBus:
LCD status panel (minitower models only).
•
One Serial EEPROM MaxiLife (also includes backup values of CMOS
•
settings).
The Input/Output Controller Hub (82801AA)
Description
16-bit and 8-bit stereo sampling from 4 kHz to 48 kHz.
•
Hardware Full Duplex Conversion.
•
16-bit software-based real-time audio
•
compression/decompression system.
Integrated OPL3 compatible music synthesizer.
•
MPC-3 audio mixer.
•
Input mixing sources: microphone, LINE In,
•
CD Audio, AUX Audio, and digitized sounds.
Output mixing of all audio sources to the LINE Out or
•
integrated PC Workstation speaker.
Multiple source recording and Left/Right channels balance.
•
Input impedance: 17k (ohms).
•
Input range: 0 to 2.83 Vpp
•
Stereo output of 100 mW per channel with headphone
•
speakers (impedance 32
Output impedance: 570
•
Output range: 0 to 2.83 Vpp.
•
20 dB gain preamplifier. The boost can be muted with
•
software.
32-level programmable volume control.
•
Input impedance: 600
•
Sensitivity: 30 mVpp to 283 mVpp.
•
Impedance: 32
•
2
C bus. It is a two-wired serial bus which runs
2 System Board
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